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weird problem with gigabyte P67A-UD4 B3 REV. 1.1

i recently built a sandy bridge system using these 2 sets of 8gb gskill memory - F3-12800CL9D-8GBRL and F3-12800CL9D-8GBXL. bios says they are running at the rated 1600 via XMP profile 1 but CPU-Z and AIDA64 both say one set is running at 1600 and one set at 1333. XMP shows as enabled and dual channel in CPU-Z. I am currently stress testing with prime95 and have had zero errors for over an hour so far. has anybody ever experienced this? system specs are in signature. thanx

Re: weird problem with gigabyte P67A-UD4 B3 REV. 1.1

2. When enabling Dual Channel mode with two or four memory modules, it is recommended that
memory of the same capacity, brand, speed, and chips be used for optimum performance.

Unfortunately you don't have match sticks.
For instanse, the BXL modules need 162ns tRFC at DDR-1600 while the BRL modules only need 110ns. Each channel has it's own controller so populating each channel with the same RAM is the better option.

Re: weird problem with gigabyte P67A-UD4 B3 REV. 1.1

Originally Posted by Chike

Unfortunately you don't have match sticks. For instanse, the BXL modules need 162ns tRFC at DDR-1600 while the BRL modules only need 110ns. Each channel has it's own controller so populating each channel with the same RAM is the better option.